Urban Ecology Center: Environmental education organization with two community centers offers a variety of programs on how to live more sustainably. Prices vary. Registration required. (414) 964-8505; urbanecologycenter.org.

North Point Lighthouse: View artifacts, artwork, and photographs of old Lake Park and marine memorabilia in the Keeper's Quarters. Limited guided tours allow visitors to climb to the top of the 74-foot tower. 2650 N. Wahl Ave. (414) 332-6754; northpointlighthouse.org.